【单选题】兽药外包装标签必须注明的内容可以不包括(2009 真题上16)
【简答题】已知复数 z= 1 2 + 3 2 i , ω= 2 2 + 2 2 i .求复数zω+zω 3 的模及辐角主值.
【单选题】President Hu Jintao visited the museum of Xiaogang Village in Anhui in November, 2008. It was the first time that he _________ here.
【简答题】复数(12+5i) 2 (239-i)的辐角主值是______.
【简答题】If A=[6,2,4;74,8,4;1,4,6],so A(1,2)+A(2,3)=(_);
【简答题】求下列复数的辐角主值: (1)e-1-2i; (2)eiβ-eiβ(0≤β
【单选题】复数2+i和-3-i的辐角主值分别是α,β,则tg(α+β)等于( )
【单选题】若复数z=(a-i)2的辐角主值是,则实数a的值是